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<h1 class="title">Restoring a Window's Geometry</h1>
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<p>This document describes how to save and restore a <a href="../qtwidgets/application-windows.html#window-geometry">window's geometry</a> using the geometry properties. On Windows, this is basically storing the result of <a href="../qtgui/qwindow.html#geometry">QWindow::geometry</a>() and calling <a href="../qtgui/qwindow.html#setGeometry">QWindow::setGeometry</a>() in the next session before calling <a href="../qtgui/qwindow.html#show">show()</a>.</p>
<p>On X11, this might not work because an invisible window does not have a frame yet. The window manager will decorate the window later. When this happens, the window shifts towards the bottom/right corner of the screen depending on the size of the decoration frame. Although X provides a way to avoid this shift, some window managers fail to implement this feature.</p>
<p>When using <a href="../qtwidgets/qtwidgets-index.html">Qt Widgets</a>, Qt provides functions that saves and restores a widget window's geometry and state for you. <a href="../qtwidgets/qwidget.html#saveGeometry">QWidget::saveGeometry</a>() saves the window geometry and maximized/fullscreen state, while <a href="../qtwidgets/qwidget.html#restoreGeometry">QWidget::restoreGeometry</a>() restores it. The restore function also checks if the restored geometry is outside the available screen geometry, and modifies it as appropriate if it is:</p>
<pre class="cpp">

  <span class="type">void</span> MyMainWindow<span class="operator">::</span>closeEvent(<span class="type"><a href="../qtgui/qcloseevent.html">QCloseEvent</a></span> <span class="operator">*</span>event)
  {
      <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="string">&quot;MyCompany&quot;</span><span class="operator">,</span> <span class="string">&quot;MyApp&quot;</span>);
      settings<span class="operator">.</span>setValue(<span class="string">&quot;geometry&quot;</span><span class="operator">,</span> saveGeometry());
      settings<span class="operator">.</span>setValue(<span class="string">&quot;windowState&quot;</span><span class="operator">,</span> saveState());
      <span class="type"><a href="../qtwidgets/qmainwindow.html">QMainWindow</a></span><span class="operator">::</span>closeEvent(event);
  }
  <span class="type">void</span> MainWindow<span class="operator">::</span>readSettings()
  {
      <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span> settings(<span class="string">&quot;MyCompany&quot;</span><span class="operator">,</span> <span class="string">&quot;MyApp&quot;</span>);
      restoreGeometry(settings<span class="operator">.</span>value(<span class="string">&quot;myWidget/geometry&quot;</span>)<span class="operator">.</span>toByteArray());
      restoreState(settings<span class="operator">.</span>value(<span class="string">&quot;myWidget/windowState&quot;</span>)<span class="operator">.</span>toByteArray());
  }

</pre>
<p>Another solution is to store both <a href="../qtwidgets/qwidget.html#pos-prop">pos()</a> and <a href="../qtwidgets/qwidget.html#size-prop">size()</a> and to restore the geometry using <a href="../qtwidgets/qwidget.html#size-prop">QWidget::resize</a>() and <a href="../qtwidgets/qwidget.html#pos-prop">move()</a> before calling <a href="../qtwidgets/qwidget.html#show">show()</a>, as demonstrated in the <a href="../qtwidgets/qtwidgets-mainwindows-application-example.html">Application</a> example.</p>
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